<!DOCTYPE HTML>
<!--
     Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/
-->
<html><head>
  <meta charset="utf-8">
  <title>Reference: Fragmentation of height:auto grid, not top-of-page, item break-inside:avoid</title>
  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1144096">
  <style type="text/css">
html,body {
    color:black; background-color:white; font-size:16px; padding:0; margin:0;
}
body { overflow:hidden; }

.columns {
  position:relative;
     -moz-columns: 5;
      -ms-columns: 5;
  -webkit-columns: 5;
          columns: 5;
     -moz-column-fill: auto;
      -ms-column-fill: auto;
  -webkit-column-fill: auto;
          column-fill: auto;
  border: 2px dashed;
  margin-bottom: 5px;
}

.grid {
  display: grid;
  grid-template-columns: 30px 30px 30px;
  grid-auto-rows: 30px;
  grid-gap: 12px;
  border:5px solid;
  align-content: space-evenly;
}
span { background:lime; border:1px solid black; }
x { display:block; height:20px; }

i { display:block; height:10px; margin-top:7px; background:blue; }
.t { border-bottom-width:0; }
.b { border-top-width:0; }
.br1 { height:94px; border-width:5px; border-top-style:solid; }

</style>
</head>
<body>

<div class="columns" style="height: 110px/*trigger NS_INLINE_IS_BREAK_BEFORE for the item*/">
<div style="padding-top:30px; background:grey">
<div class="grid">
<span><i></i><i></i><i></i><i></i><i></i><i></i><x></x></span>
</div>
</div></div>

<div class="columns" style="height: 70px/*item will be INCOMPLETE*/">
<div style="background:grey">
<div class="grid">
<span><i></i><i></i><i></i><i></i><i></i><i></i><x></x></span>
</div>
</div></div>

<div class="columns" style="height: 100px/*item will be INCOMPLETE*/">
<div style="background:grey">
<div class="grid">
<span style="grid-row:span 2"><i></i><i></i><i></i><i></i><i></i><i></i><x></x></span>
</div>
</div></div>

<div class="columns" style="height: 140px/*trigger NS_INLINE_IS_BREAK_BEFORE for the item*/">
<div style="padding-top:30px; background:grey">
<div class="grid">
<span style="grid-row:span 3"><x></x></span>
<span style="grid-row:span 2"><i></i><i></i><i></i><i></i><i></i><i></i><i></i><i></i><i></i><x></x></span></div>
</div></div>

<div class="columns" style="height: 100px/*trigger NS_INLINE_IS_BREAK_BEFORE for the item*/">
<div style="padding-top:1px; background:grey">
<div class="grid t" style="grid-auto-rows: 50px; height:50px;">
<span class="t" style="grid-row:span 2; height:49px; overflow:hidden"><i></i><i></i><i></i><x></x></span>
</div>
<div style="height:44px"></div>
<div class="grid b" style="grid-auto-rows: 50px; height:50px;">
<span class="b" style="grid-row:span 2; height:11px; overflow:hidden"><i style="margin-top:0;height:2px"></i><x></x></span>
</div>
</div></div>

<div class="columns" style="height: 100px/*trigger NS_INLINE_IS_BREAK_BEFORE for the item*/">
<div style="padding-top:1px; background:grey">
<div class="br1"></div>
<div class="grid b" style="grid-auto-rows: 50px; height:116px;">
<span style="grid-row:span 2; height:60px"><i></i><i></i><i></i><x></x></span>
</div>
</div></div>

<div class="columns" style="height: 100px/*trigger NS_INLINE_IS_BREAK_BEFORE for the item*/">
<div style="padding-top:1px; background:grey">
<div class="br1"></div>
<div class="grid b" style="grid-auto-rows: 50px; height:116px; grid-gap:0;">
<span style="grid-row:span 2; height:60px"><i></i><i></i><i></i><x></x></span>
</div>
</div></div>

<div class="columns" style="height: 100px/*trigger NS_INLINE_IS_BREAK_BEFORE for the item*/">
<div style="padding-top:1px; background:grey">
<div class="br1"></div>
<div class="grid b" style="grid-auto-rows: 50px; height:116px; grid-gap:0;">
<span style="height:100px; background:pink"><x></x></span>
<span style="grid-row:span 2; height:60px"><i></i><i></i><i></i><x></x></span>
</div>
</div></div>


</body>
</html>
